Convert a list of key value pairs to a hashtable - powershell

Question

What is the best way to convert a List to a Hashtable?
Say I have a list like ("Key",$value,"Key2",$value2)
What is the shortest syntax to convert it into a Hashtable?

Answer 1

Try the following
$table = new-object System.Collections.Hashtable
for ( $i = 0; $i -lt $list.Length; $i += 2 ) {
$table.Add($list[$i],$list[$i+1]);
}

Answer 2

Function ConvertTo-Hashtable($list) {
$h = #{}
while($list) {
$head, $next, $list = $list
$h.$head = $next
}
$h
}
ConvertTo-Hashtable ("Key",1,"Key2",2)

Answer 3

If your list is composed of NameValuePair objects, then you can use:
Function ConvertListOfNVPTo-Hashtable($list) {
$h = #{}
$list | ForEach-Object {
$h[$_.Name] = $_.Value
}
return $h
}

Answer 4

$h = #{}
0..($l.count - 1) | ? {$_ -band 1} | % {$h.Add($l[$_-1],$l[$_])}
$h = #{}
0..($l.count - 1) | ? {$_ -band 1} | % {$h.($l[$_-1]) = $l[$_]}
$h = #{}
$i = 0
while ($i -lt $l.count) {$h.Add($l[$i++],$l[$i++])}

Answer 5

How about:
$ht = #{}
$key = "";
("Key",5,"Key2",6) | foreach `
{
if($key)
{
$ht.$key = $_;
$key="";
} else
{$key=$_}
}

Answer 6

function Select-Hashtable {
[CmdletBinding()]
param(
[Parameter(ValueFromPipeline)]
[PSObject[]]$InputObject,
[Parameter(Mandatory)]
[string]$Property
)
begin { $hashtable = [Hashtable]::new() }
process { $InputObject | %{ $hashtable[$_."$Property"] = $_} }
end { $hashtable }
}
then (a pointless example):
$items = Get-ChildItem -Path $path | Select-Hashtable -Property Name
$documents = $items['Documents']